Publications (139)
Shadowing Corrections and Diffractive Production in DIS on Nuclei
E. Gotsman, E. Levin, M. Lublinsky +2
We calculate, in the Glauber-Mueller approach, the ratio of the diffractive dissociation cross section to the total cross section on nuclei. We observe that shadowing corrections (…
On relation between rest frame and light-front descriptions of quarkonium
B. Z. Kopeliovich, E. Levin, Ivan Schmidt +1
In this paper we study the relation between the light-front (infinite momentum) and rest-frame descriptions of quarkonia. While the former is more convenient for high-energy produc…
The BFKL Pomeron Calculus in the dipole approach
M. Kozlov, E. Levin, A. Prygarin
In this paper we continue to pursue a goal of finding an effective theory for high energy interaction in QCD based on the colour dipole approach, for which the BFKL Pomeron Calculu…
High energy amplitude in the dipole approach with Pomeron loops: asymptotic solution
E. Levin
In this paper an analytical solution for the high energy scattering amplitude is suggested. This solution has several unexpected features:(i) the asymptotic amplitude is a function…
Double parton interaction: the values of
E. Gotsman, E. Levin
In this letter we show that the two parton showers mechanism for production, that has been discussed in Ref.[28], leads to small values of for the production…
Large impact parameter behaviour in the CGC/saturation approach: a new non-linear equation
E. Gotsman, E. Levin
In this paper we propose a solution to the long standing problem in the CGC/saturation approach: the power-like fall off of the scattering amplitudes at large . We propose a new…
Perturbative QCD and beyond: azimuthal angle correlations in deuteron-deuteron scattering from Bose-Einstein correlations
E. Gotsman, E. Levin
In this paper, we found within the framework of perturbative QCD, that in deuteron-deuteron scattering the Bose-Einstein correlations due to two parton showers production, induce a…
The BFKL Pomeron Calculus in zero transverse dimensions: diffractive processes and survival probability for central diffractive production
M. Kozlov, E. Levin, V. Khachatryan +1
In this paper we discuss the processes of diffractive production in the framework of the BFKL Pomeron calculus in zero transverse dimension. Considering the diffractive production…
A QCD motivated model for soft interactions at high energies
E. Gotsman, E. Levin, U. Maor +1
In this paper we develop an approach to soft scattering processes at high energies,which is based on two mechanisms: Good-Walker mechanism for low mass diffractionand multi-Pomeron…
The effect of screening on the and bhaviour of slopes
E. Gotsman, E. Levin, U. Maor +1
A systematic study of and is carried out in pQCD taking screening corrections in…
High energy evolution for Gribov-Zwanziger confinement: solution to the equation
E. Gotsman, Yu. Ivanov, E. Levin
In this paper we solved the new evolution equation for high energy scattering amplitudethat stems from the Gribov-Zwanziger approach to the confinement of quarks and gluons. We fou…
Anomalous Dimensions of High Twist Operators in QCD at and large $Q^2
E. Laenen, E. Levin, A. G. Shuvaev
The anomalous dimensions of high-twist operators in deeply inelastic scattering () are calculated in the limit when the moment variable (or $x_B\rightarr…
A QCD motivated model for soft processes
A. Kormilitzin, E. Levin
In this talk we give a brief description of a QCD motivated model for both hard and soft interactions at high energies. In this model the long distance behaviour of the scattering…
Soft interaction model and the LHC data
E. Gotsman, E. Levin, U. Maor
Most models for soft interactions which were proposed prior to the measurements at the LHC, are only marginally compatible with LHC data, our GLM model has the same deficiency. In…
J/ÏPhoto- and DIS Production via Nonlinear Evolution
E. Gotsman, E. Levin, M. Lublinsky +2
We apply our solution of the nonlinear evolution equation to the case of photo and DIS production on nucleons and nuclei targets. The uncertainty in the wave function…
HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings - Part A
S. Alekhin, G. Altarelli, N. Amapane +191
The HERA electron--proton collider has collected 100 pb of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors…
A geometrical scaling solution to the BFKL Pomeron Calculus in the saturation domain
E. Levin
In this paper the exact analytical solution is found for the BFKL Pomeron calculus in QCD, in which all Pomeron loops have been included. This solution manifests the geometrical sc…
HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings - Part B
S. Alekhin, G. Altarelli, N. Amapane +191
The HERA electron--proton collider has collected 100 pb of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors…
Bose-Einstein correlations and and in hadron and nucleus collisions
E. Gotsman, E. Levin, U. Maor
We show that Bose-Einstein correlations of identical particles in hadron and nucleus high energy collisions, lead to long range rapidity correlations in the azimuthal angle. These…
A modified Balitsky-Kovchegov equation
E. Gotsman, E. Levin, U. Maor +1
We propose a modified version of the Balitsky-Kovchegov (B-K) evolution equation, which includes the main NLO corrections. We use the result that the main NLO corrections to the BF…
Everything about reggeons.Part I:Reggeons in "soft" interaction
E. Levin
This is the first part of my lectures on the Pomeron structure which I am going to read during this academic year at the Tel Aviv university. The main goal of these lectures is to…
New Scaling at High Energy DIS
E. Levin, K. Tuchin
We develop a new approach for solving the non-linear evolution equation in the low region and show that the remarkable "geometric" scaling of its solution holds not only in t…
Two parton shower background for associate W Higgs production
E. Levin, J. Miller
The estimates of the background for the associate W Higgs production, which stems from the two parton shower production. It is about 1 - 2.5 times larger than the signal. However,…
CGC/saturation approach for soft interactions at high energy: a two channel model
E. Gotsman, E. Levin, U. Maor
In this paper we continue the development of a model for strong interactions at high energy, based on two ingredients: CGC/saturation approach and the BFKL Pomeron. In our approach…
QCD Saturation and Photoproduction on Proton and Nuclei Targets
J. Bartels, E. Gotsman, E. Levin +2
We calculate inclusive photoproduction cross-sections for both proton and nuclei targets, using a saturation model derived from an approximate solution to the Balitsky-Kovchegov no…
The survival probability of large rapidity gaps in a three channel model
E. Gotsman, E. Levin, U. Maor
The values and energy dependence for the survival probability of large rapidity gaps (LRG) are calculated in a three channel model. This model includes single an…
Classical gluodynamics in curved space--time and the soft Pomeron
D. Kharzeev, E. Levin, K. Tuchin
QCD at the classical level possesses scale invariance which is broken by quantum effects. This ``dimensional transmutation'' phenomenon can be mathematically described by formulati…
High energy QCD: multiplicity dependence of quarkonia production
E. Gotsman, E. Levin
In this paper we propose an approach which demonstrates the dependence of quarkoni production on the multiplicity of the accompanying hadrons. Our approach is based on the three gl…
Bose-Einstein enhancement in the evolution of the double parton densities at high energy
E. Gotsman, E. Levin
In the paper we include Bose-Einsten correlations for identical gluons, in the evolution of the double parton densities at low (high energies). We show that these correlations…
Gribov-Zwanziger confinement, high energy evolution and large impact parameter behaviour of the scattering amplitude
E. Gotsman, E. Levin
In this paper we derive the high energy evolution equation in the Gribov-Zwanziger approach, for the confinement of quarks and gluons. We demonstrate that the new equation generate…
Saturation effects at LHC energies
E. Gotsman, E. Levin, U. Maor +1
Within the framework of a modified Balitsky-Kovchegov equation, we calculated and provide estimates of non-linear saturation effects expected in the LHC range of energies.
A new parton model for the soft interactions at high energies
E. Gotsman, E. Levin, I. Potashnikova
We propose a new parton model and demonstrate that the model describes the relevant experimental data at high energies. The model is based on Pomeron calculus in 1+1 space-time dim…
A comprehensive model of soft interactions in the LHC era
E. Gotsman, E. Levin, U. Maor
In this review we present our model which is an example of the self consistent approach that incorporates our theoretical understanding of long distance physics, based both on N=4…
Nonlinear evolution and saturation for heavy nuclei in DIS
E. Levin, K. Tuchin
The nonlinear evolution equation for the scattering amplitude of colour dipole off the heavy nucleus is solved in the double logarithmic approximation. It is found that if the init…
Higher Twist Corrections and Maxima for DIS on a Proton in the High Density QCD Region
E. Gotsman, E. Levin, U. Maor +2
We show that the ratio of different structure functions have a maximum which depends on energy. We argue, using Golec-Biernat and Wusthoff model, that these maxima are the certain…
Screening corrections in DIS at low Q^2 and x
E. Gotsman, E. Ferreira, E. Levin +2
In this investigation we present a detailed study of which is supported by a coupled analysis of photo and DIS production. Both channels are…
QCD motivated approach to soft interactions at high energy: inclusive production
E. Gotsman, E. Levin, U. Maor
We extend our two component Pomeron model (GLMM) for soft high energy scattering to single inclusive cross sections. We present a suitable formulation which also includes the semi…
Description of LHC data in a soft interaction model
E. Gotsman, E. Levin, U. Maor
We show in this paper that we have found a set of parameters in our model for the soft interactions at high energy, that successfully describes all high energy experimental data, i…
Proton-air collisions in a model of soft interactions at high energies
E. Gotsman, E. Levin, U. Maor
We show that Pomeron interactions generate important corrections to the Gribov-Glauber formula, which is used to extract proton-proton cross sections from proton-air collisions at…
Energy Dependence of Ï^{DD}/Ï_{tot} in DIS and Shadowing Corrections
E. Gotsman, E. Levin, M. Lublinsky +2
We gereralize the Kochegov-McLerran formula for the ratio in perturbative QCD, using Mueller-Glauber approach for shadowing corrections and AGK cutting rules. We…
Soft interaction at high energy and N=4 SYM
E. Levin, I. Potashnikova
In this paper we show that the N=4 SYM total cross section violates the Froissart theorem, and in the huge range of energy this cross section is proportional to . The grav…
Energy dependence of the survival probability of large rapidity gap
E. Gotsman, E. Levin, U. Maor
The energy dependence for the survival probability of large rapidity gaps (LRG) , is calculated in an Eikonal model assuming a Gaussian opacity. The parameters d…
A new evolution equation
E. Laenen, E. Levin
We propose a new evolution equation for the gluon density relevant for the region of small . It generalizes the GLR equation and allows deeper penetration in dense parton syst…
Summing Pomeron loops in the dipole approach
E. Levin, J. Miller, and A. Prygarin
In this paper we argue that in the kinematic range given by $ 1 \ll \ln(1/\as^2) \ll \as Y \ll \frac{1}{\as}$, we can reduce the Pomeron calculus to the exchange of non-interacting…
Parton saturation and N_part scaling of semi--hard processes in QCD
D. Kharzeev, E. Levin, L. McLerran
We argue that the suppression of high p_t hadrons discovered recently in heavy ion collisions at RHIC may be a consequence of saturation in the Color Glass Condensate. We qualitati…
Scale Anomaly and "Soft" Pomeron in QCD
D. Kharzeev, E. Levin
We propose a new non-perturbative approach to hadronic interactions at high energies and small momentum transfer, which is based on the scale anomaly of QCD and emphasizes the role…
Screening Corrections in Photo and DIS Production of
E. Gotsman, E. Ferreira, E. Levin +2
Photo and DIS production of are investigated and compared with calculations based on pQCD in the LLA approximation without and with screening corrections. The calculation in…
Survival probability of large rapidity gaps in QCD and N=4 SYM motivated model
E. Gotsman, E. Levin, U. Maor
In this paper we present a self consistent theoretical approach for the calculation of the Survival Probability for central dijet production . These calculations are performed in a…
The Dipole Picture and Saturation in Soft Processes
J. Bartels, E. Gotsman, E. Levin +2
We attempt to describe soft hadron interactions in the framework of saturation models, one based upon the Balitsky-Kovchegov non-linear equation and another one due to Golec-Bierna…
Momentum Transfer Dependence of the Differential Cross Section for Production
E. Gotsman, E. Levin, U. Maor +1
We discuss the dependence of production in the region of . The forward slope of the elastic differential cross section is calculated assuming a dipole-ty…
Nuclei in the toy world: beyond the Pomeron in zero transverse dimensions
A. Kovner, E. Levin, M. Lublinsky
We explore possible extensions of the -channel and -channel unitary model of high energy evolution in zero transverse dimensions appropriate to very high energy/atomic number…
A Linear Evolution for Non-Linear Dynamics and Correlations in Realistic Nuclei
E. Levin, M. Lublinsky
A new approach to high energy evolution based on a linear equation for QCD generating functional is developed. This approach opens a possibility for systematic study of correlation…
N=4 SYM and QCD motivated approach to soft interactions at high energies
E. Gotsman, E. Levin, U. Maor
In this paper we construct a model that satisfies the theoretical requisites of high energy soft interactions, based on two ingredients:(i) the results of N=4 SYM, which at present…
CGC/saturation approach: re-visiting the problem of odd harmonics in angular correlations
E. Gotsman, E. Levin
In this paper we demonstrate that the selection of events with different multiplicities of produced particles, leads to the violation of the azimuthal angular symmetry, $Ï\to Ï-…
Diffractive dissociation and saturation scale from non-linear evolution in high energy DIS
E. Levin, M. Lublinsky
This paper presents the first numerical solution to the non-linear evolution equation for diffractive dissociation processes in deep inelastic scattering. It is shown that the solu…
CGC/saturation approach: secondary Reggeons and dependence on energy
E. Gotsman, E. Levin, I. Potashnikova
In this letter we demonstrate that a model which is based on the CGC/saturation approach, is able to describe soft interaction collisions for the wide range of $W=\sqrt{s} = 30 \,G…
Non-linear QCD
E. Levin
In this talk I give the mini-review on recent development in the non-linear QCD (at low ).
Unitarity bound for gluon shadowing
B. Z. Kopeliovich, E. Levin, I. K. Potashnikova +1
Although at small Bjorken x gluons originated from different nucleons in a nucleus overlap in the longitudinal direction, most of them are still well separated in the transverse pl…
Towards a new global QCD analysis: low x DIS data from non-linear evolution
E. Gotsman, E. Levin, M. Lublinsky +1
A new approach to global QCD analysis is developed. The main ingredients are two QCD-based evolution equations. The first one is the Balitsky-Kovchegov nonlinear equation, which su…
An Inclusive Cross Section for the Nucleus - Nucleus Interaction at RHIC Energies
S. Bondarenko, E. Gotsman, E. Levin +1
We discuss the saturation of the parton density in heavy ion collisions at RHIC energiesusing a Pomeron approach. Our predictions for the particle density in ion-ion collisions at…
CGC/saturation approach for soft interactions at high energy: long range rapidity correlations
E. Gotsman, E. Levin, U. Maor
In this paper we continue our program to build a model for high energy soft interactions, that is based on the CGC/saturation approach.The main result of this paper is that we have…
Has HERA reached a new QCD regime?
E. Gotsman, E. Levin, M. Lublinsky +3
These notes are a summary of our efforts to answer the question in the title. Our answer is in the affirmative as: (i) HERA data indicate a large value of the gluon structure funct…
Energy evolution and the Bose-Einstein enhancement for double parton densities
E. Gotsman, E. Levin
In this paper we found that the Bose-Einstein enhancement generates the strong correlations, which increase with energy in the BFKL evolution. This increase leads to the double par…
The Components of the $γ^*γ^*$ Cross Section
E. Gotsman, E. Levin, U. Maor +1
We extend our previous treatment of $γ^*p$ cross section based on Gribov's hypothesis to the case of photon-photon scattering. With the aid of two parameters, determined from expe…
Survival Probability of Large Rapidity Gaps
E. Levin, A. D. Martin, M. G. Ryskin
We summarize the discussions on the value of the survival probabilities of large rapidity gap (LRG) processes at Durham WS'98.
Gluon structure function for deeply inelastic scattering with nucleus in QCD
M. B. Gay Ducati, Alvaro L. Ayala, E. Levin
In this talk we present the first calculation of the gluon structure function for nucleus in QCD. We discuss the Glauber formula for the gluon structure function and the violation…
The Phenomenology of Pomeron Enhancement
E. Gotsman, E. Levin, U. Maor +1
Multi Pomeron interactions are the main source of high mass diffraction. Their role in high energy dynamics greatly influences the predictions for high energy cross sections and su…
Small x Phenomenology: Summary and status 2002
The Small x Collaboration, J. Andersen, S. Baranov +21
A second workshop on small x physics, within the Small x Collaboration, was held in Lund in June 2002 with the aim of over-viewing recent theoretical progress in this area and summ…
Central exclusive diffractive Higgs boson production in hadron-nucleus and nucleus-nucleus collisions at the LHC
E. Levin, J. Miller
In this paper, it is shown that in hadron-nucleus and nucleus-nucleus collisions, the main source for central exclusive diffractive Higgs production is photon-photon fusion. At the…
25 years with the Pomeron
E. Levin
This paper is written for "Gribov Memorial Volume", Heavy Ion Physics, Acta Physica Hungarica. This is a report on my 25 years activity in understanding of the Pomeron structure. S…
Parton densities and saturation scale from non-linear evolution in DIS on nuclei
E. Levin, M. Lublinsky
We present the numerical solution of the non-linear evolution equation for DIS on nuclei for . We demonstrate that the solution to the non-linear evolution e…
QCD Saturation and Deuteron-Nucleus Collisions
D. Kharzeev, E. Levin, M. Nardi
We make quantitative predictions for the rapidity and centrality dependencies of hadron multiplicities in dA collisions at RHIC basing on the ideas of parton saturation in the Colo…
12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD
J. Bartels, K. Borras, M. Diehl +118
Proceedings of the 12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD
A new parton model for the soft interactions at high energies: the Odderon
E. Gotsman, E. Levin, I. Potashnikova
In this paper we discuss the Odderon contribution in our model[19] that gives a fairly good description of and for proton-proton scattering…
Diffraction Production in a Soft Interaction Model: Mass Distributions
E. Gotsman, E. Levin, U. Maor
In the framework of our model (GLM) for soft interaction with $α'_{\pom}(0)=0$, we propose a procedure based on Gribov's partonic interpretation of the Pomeron, which enables one…
A model for strong interactions at high energy based on the CGC/saturation approach
E. Gotsman, E. Levin, U. Maor
We present our first attempt to develop a model for soft interactions at high energy, based on the BFKL Pomeron and the CGC/saturation approach. We construct an eikonal-type model,…
High energy QCD: multiplicity distribution and entanglement entropy
E. Gotsman, E. Levin
In this paper we show that QCD at high energies leads to the multiplicity distribution $\frac{Ï_n}{Ï_{ \rm in}}\,\,=\,\,\frac{1}{N}\,\Lb \frac{N\,-\,1}{N}\Rb^{n - 1}$, (where …
The BFKL Pomeron calculus: summing enhanced diagrams
E. Levin, J. Miller
The goal of this paper is to sum over a class of enhanced diagrams, and derive a new Pomeron Green function. It is found that this sum gives the Pomeron contribution to the scatter…
Survival Probability of Large Rapidity Gaps
E. Gotsman, E. Levin, U. Maor +2
Our presentation centers on the consequences of s-channel unitarity, manifested by soft re-scatterings of the spectator partons in a high energy diffractive process, focusing on th…
CGC/saturation approach for soft interactions at high energy: survival probability of the central exclusive production
E. Gotsman, E. Levin, U. Maor
We estimate the value of the survival probability for central exclusive production, in a model, which is based on the CGC/saturation approach. Hard and soft processes are described…
Solution to the Balitsky-Kovchegov equation in the saturation domain
M. Kozlov, E. Levin
The solution to the Balitsky-Kovchegov equation is found in the deep saturation domain. The controversy between different approaches regarding the asymptotic behaviour of the scatt…
Solution for the BFKL Pomeron Calculus in zero transverse dimensions
M. Kozlov, E. Levin
In this paper the exact analytical solution is found for the BFKL Pomeron calculus in zero transverse dimensions, in which all Pomeron loops have been included. The comparison with…
Saturation at low
E. Levin
This talk is an attempt to review all our knowledge on saturation at low both theoretical and experimental, to stimulate a search for saturation effects at THERA. The main goal…
A new parton model for the soft interactions at high energies: two channel approximation
E. Gotsman, E. Levin, I. Potashnikova
The primary goal of this paper is to describe the diffraction production using the model that takes into account the Pomeron interaction, and satisfies both and channel uni…
Hard inclusive production and a violation of the factorization theorem
E. Gotsman, E. Levin, U. Maor
A new mechanism for hard inclusive production, which leads to a violation of the factorization theorem, is suggested. The mechanism is illustrated by a detailed discussion of Higgs…
A Pomeron Approach to Hadron-Nucleus and Nucleus-Nucleus "Soft" Interactions at High Energy
S. Bondarenko, E. Gotsman, E. Levin +1
We formulate a generalization of the Glauber formalism for hadron-nucleus and nucleus-nucleus collisions based on the Pomeron approach to high energy interactions. Our treatment is…
Hadron multiplicities at the LHC
D. Kharzeev, E. Levin, M. Nardi
We present the predictions for hadron multiplicities in pp, pA and AA collisions at the LHC based on our approach to the Color Glass Condensate.
Evolution equations for high parton density QCD
E. Levin
This talk is given at "Continious Advances in QCD", Minnesota, April 16-19,1998. It is a brief report on our results in high parton density QCD. The main goal of this talk is to di…
Soft processes at high energy without soft Pomeron: a QCD motivated model
A. Kormilitzin, E. Levin
In this paper we develop a QCD motivated model for both hard and soft interactions at high energies. In this model the long distance behavior of the scattering amplitude is determi…
Higher twists and maxima for DIS on nuclei in high density QCD region
E. Gotsman, E. Levin, U. Maor +2
We show that the ratio of different structure functions have a maximum which depends on and . We argue that these maxima are proportional to the saturation scale. The anal…
Multiplicity dependence of quarkonia production at ultra high energies
E. Levin
In this paper we propose an approach in high energy QCD, which allows us to calculate the inclusive quarkonia production at ultra high energies. This approach is based on -chann…
The onset of classical QCD dynamics in relativistic heavy ion collisions
D. Kharzeev, E. Levin, M. Nardi
The experimental results on hadron production obtained recently at RHIC offer a new prospective on the energy dependence of the nuclear collision dynamics. In particular, it is pos…
Scaling Violations in the Logarithmic Derivative of
E. Gotsman, E. Ferreira, E. Levin +2
We examine the latest HERA experimental measurements of the logarithmic derivative of the proton structure function. We analyze the characteristics of DGLAP with and without…
Inelastic processes in DIS and N=4 SYM
E. Levin, I. Potashnikova
In this paper we compare the prediction for deep inelastic scattering from N=4 SYM with the HERA experimental data. The paper conveys two results. The first is the message that N=4…
Glauber - Gribov approach for DIS on nuclei in N=4 SYM
E. Levin, J. Miller, B. Z. Kopeliovich +1
In this paper the Glauber-Gribov approach for deep-inelastic scattering (DIS) with nuclei is developed in N=4 SYM. It is shown that the amplitude displays the same general properti…
Inclusive gluon production in the dipole approach: AGK cutting rules
E. Levin, A. Prygarin
We consider single gluon production in the dipole model and reproduce the result of Kovchegov and Tuchin for the adjoint (gluonic) dipole structure of the inclusive cross section.…
CGC/saturation approach for soft interactions at high energy: inclusive production
E. Gotsman, E. Levin, U. Maor
In this letter we demonstrate that our dipole model is successful in describing the inclusive production within the same framework as diffractive physics. We believe that this achi…
Thermal radiation and inclusive production in the KLN model for ion-ion collisions
E. Gotsman, E. Levin
We show that in order to obtain a successful description of the transverse momenta distribution for charged particles in ion-ion collisions, one must include a thermal emission ter…
Soft Double-Diffractive Higgs Production at Hadron Colliders
D. Kharzeev, E. Levin
We evaluate the non-perturbative contribution to the double-diffractive production of the Higgs boson, which arises due to the QCD scale anomaly if the mass of the Higgs M_H is sma…
Heavy Ion Collisions at the LHC - Last Call for Predictions
S. Abreu, S. V. Akkelin, J. Alam +164
This writeup is a compilation of the predictions for the forthcoming Heavy Ion Program at the Large Hadron Collider, as presented at the CERN Theory Institute 'Heavy Ion Collisions…